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| Hauptseite > Publikationsdatenbank > First experiments with the polarized internal gas target at ANKE/COSY |
| Hauptseite > Publikationsdatenbank > First experiments with the polarized internal gas target at ANKE/COSY |
| Journal Article | PreJuSER-18766 |
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2011
IOP Publ.
Bristol
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Please use a persistent id in citations: http://hdl.handle.net/2128/25185 doi:10.1088/1742-6596/295/1/012148
Abstract: A Polarized Internal gas Target (PIT) has been developed for the ANKE spectrometer at COSY. After its first installation at the ANKE target position in summer 2005, commissioning studies were carried out. In March 2006, first single polarization m easurements with the polarized hydrogen beam from an Atomic Beam Source (ABS) were performed. The beam was injected into a storage cell made from aluminum foil. The data analysis showed that the events from the extended gas target can be clearly identifie d in the ANKE forward detection system. Using unpolarized nitrogen, the background from the cell walls could be determined as well. The thickness of the gas in the storage cell with the hydrogen atoms in hyperfinestate |1rangle was measured as 2Oe10(13) a toms/cm(2). The ABS jet target thickness was 1.5Oe10(11) atoms/cm(2). In November 2006, the commissioning of a Silicon Tracking Telescope (STT) was successfully finished. In the following beam time in January 2007, a new storage cell from aluminum coated with teflon was used together with the STT. The Lamb-shift polarimeter (LSP) was mounted below the target chamber to allow for online tuning of the transition units and monitoring of the ABS jet polarization. A first double-polarized experiment was perfor med, the results will be presented.
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